Question

In an experiment, 20mL of standard hard water of 0.01256 N consumes 21.5mL of
EDTA. 20mL of sample hard water consumes 15mL of standardized EDTA. 20mL of the
same sample water after boiling and filtering consumes 5mL of the standardized EDTA.
Calculate the total hardness, permanent and temporary hardness of the given water
sample

Answer 1

Answer:

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